Lazily apply changes to border_width and border_color

Fixes: https://github.com/awesomeWM/awesome/issues/592
Signed-off-by: Uli Schlachter <psychon@znc.in>

event.h

@@ -36,6 +36,7 @@ void drawin_refresh(void);
 
 /* objects/client.c */
 void client_focus_refresh(void);
+void client_border_refresh(void);
 
 static inline int
 awesome_refresh(void)
@@ -44,6 +45,7 @@ awesome_refresh(void)
     banning_refresh();
     stack_refresh();
     drawin_refresh();
+    client_border_refresh();
     client_focus_refresh();
     return xcb_flush(globalconf.connection);
 }

objects/client.c

@@ -453,6 +453,13 @@ client_focus_refresh(void)
                         win, globalconf.timestamp);
 }
 
+void
+client_border_refresh(void)
+{
+    foreach(c, globalconf.clients)
+        window_border_refresh((window_t *) *c);
+}
+
 static void
 border_width_callback(client_t *c, uint16_t old_width, uint16_t new_width)
 {

objects/drawin.c

@@ -165,7 +165,10 @@ void
 drawin_refresh(void)
 {
     foreach(item, globalconf.drawins)
+    {
         drawin_apply_moveresize(*item);
+        window_border_refresh((window_t *) *item);
+    }
 }
 
 /** Move and/or resize a drawin

objects/window.c

@@ -148,6 +148,19 @@ luaA_window_get_opacity(lua_State *L, window_t *window)
     return 1;
 }
 
+void
+window_border_refresh(window_t *window)
+{
+    if(!window->border_need_update)
+        return;
+    window->border_need_update = false;
+    xwindow_set_border_color(window_get(window), &window->border_color);
+    if(window->window)
+        xcb_configure_window(globalconf.connection, window_get(window),
+                             XCB_CONFIG_WINDOW_BORDER_WIDTH,
+                             (uint32_t[]) { window->border_width });
+}
+
 /** Set the window border color.
  * \param L The Lua VM state.
  * \param window The window object.
@@ -162,7 +175,7 @@ luaA_window_set_border_color(lua_State *L, window_t *window)
     if(color_name &&
        color_init_reply(color_init_unchecked(&window->border_color, color_name, len)))
     {
-        xwindow_set_border_color(window_get(window), &window->border_color);
+        window->border_need_update = true;
         luaA_object_emit_signal(L, -3, "property::border_color", 0);
     }
 
@@ -183,11 +196,7 @@ window_set_border_width(lua_State *L, int idx, int width)
     if(width == window->border_width || width < 0)
         return;
 
-    if(window->window)
+    window->border_need_update = true;
-        xcb_configure_window(globalconf.connection, window_get(window),
-                             XCB_CONFIG_WINDOW_BORDER_WIDTH,
-                             (uint32_t[]) { width });
-
     window->border_width = width;
 
     if(window->border_width_callback)

objects/window.h

@@ -62,6 +62,8 @@ typedef enum
     strut_t strut; \
     /** Button bindings */ \
     button_array_t buttons; \
+    /** Do we have pending border changes? */ \
+    bool border_need_update; \
     /** Border color */ \
     color_t border_color; \
     /** Border width */ \
@@ -83,6 +85,7 @@ void window_class_setup(lua_State *);
 
 void window_set_opacity(lua_State *, int, double);
 void window_set_border_width(lua_State *, int, int);
+void window_border_refresh(window_t *);
 int luaA_window_get_type(lua_State *, window_t *);
 int luaA_window_set_type(lua_State *, window_t *);
 uint32_t window_translate_type(window_type_t);